<template>
    <section class="real-app">
        <input type="text"
            class="add-input"
            autofocus="autofocus"
            placeholder="todo"
            @keyup.enter="addTodo"
        >
        <Item :todo="todo"
            v-for="todo in filteredTodos"
            :key="todo.id"
            @del="deleteTodo"
        />
        <Tabs :filter="filter" :todos="todos" @toggle="toggleFilter" @clearAllCompleted="clearAllCompleted"></Tabs>
    </section>
</template>

<script>
import Item from './item.vue'
import Tabs from './tabs.vue'
let id = 0
export default {
  data () {
    return {
      todos: [

      ],
      filter: 'all'
    }
  },
  methods: {
    addTodo (e) {
      this.todos.unshift({
        id: id++,
        content: e.target.value.trim(),
        completed: false
      })
      e.target.value = ''
    },
    deleteTodo (id) {
      this.todos.splice(this.todos.findIndex(todo => todo.id === id), 1)
    },
    toggleFilter (state) {
      this.filter = state
    },
    clearAllCompleted () {
      this.todos = this.todos.filter(todo => !todo.completed)
    }
  },
  computed: {
    filteredTodos () {
      if (this.filter === 'all') {
        return this.todos
      }
      const completed = this.filter === 'completed'
      return this.todos.filter(todo => completed === todo.completed)
    }
  },
  components: {
    Item,
    Tabs
  }
}
</script>

<style lang="stylus" scoped>
.real-app {
    width: 600px;
    margin: 0 auto;
    box-shadow: 0 0 5px #666;
}

.add-input {
    position: relative;
    margin: 0;
    width: 100%;
    font-size: 24px;
    font-family: inherit;
    font-weight: inherit;
    line-height: 1.4em;
    border: 0;
    outline: none;
    color: inherit;
    padding: 6px;
    border: 1px solid #999;
    box-shadow: inset 0 -1px 5px 0 rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
    font-smoothing: antialiased;
    padding: 16px 16px 16px 60px;
    border: none;
    box-shadow: inset 0 -2px 1px rgba(0, 0, 0, 0.03);
}
</style>


